Sylina was commanded to kill him with a single strike to the heart, but she did not expect her own heart to betray her. She has sacrificed everything for her goddess—her soul, her freedom, and her eyes. Life in service to the Arachessen, a cult of the Goddess of Fate, has turned Sylina from an orphaned street-rat into a disciplined killer determined to overthrow the tyrannical king of Glaea. When a brutal vampire conqueror arrives on their shores, Sylina faces a deadly new adversary.

Tasked with infiltrating his army to earn his trust and kill him, she becomes a seer for Atrius, a terrifying warrior carving an unstoppable path through Glaea. As she glimpses his dark past, she discovers a side of him that reminds her of the parts of herself she would rather forget. Though her orders are clear, her connection with Atrius grows stronger even as the blood spilled by the tyrant king runs thicker. It is a connection forbidden by her vows—one that could cost her everything.